n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 3 |
4 | 6 |
5 | 12 |
6 | 26 |
7 | 60 |
8 | 144 |
9 | 366 |
10 | 960 |
11 | 2640 |
12 | 7464 |
13 | 21960 |
14 | 66240 |
15 | 206760 |
16 | 660240 |
17 | 2172240 |
18 | 7298640 |
19 | 25179840 |
20 | 88583040 |
21 | 319097520 |
22 | 1170650880 |
23 | 4387582080 |
24 | 16728808320 |
25 | 65040796800 |
26 | 256987987200 |
27 | 1033805566080 |
28 | 4222598688000 |
29 | 17536408243200 |
30 | 73886160096000 |
[1,2,3,6,12,26,60,144,366,960,2640,7464,21960, 66240,206760,660240,2172240,7298640,25179840, 88583040,319097520,1170650880,4387582080, 16728808320,65040796800,256987987200, 1033805566080,4222598688000,17536408243200, 73886160096000] |